Home / 13,759.29-18,986.16-7,709.85

Finding the Fourth Proportional to 13,759.29, 18,986.16 and 7,709.85

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Solution

The fourth proportional to 13,759.29, 18,986.16 and 7,709.85 is: 10,638.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.29 : 18,986.16 = 7,709.85 : x
  2. Step 2: Convert to fraction form
    13,759.29/18,986.16 = 7,709.85/x
  3. Step 3: Cross multiply
    13,759.29x = 18,986.16 × 7,709.85
  4. Step 4: Simplify right side
    13,759.29x = 146,380,445.68
  5. Step 5: Solve for x
    x = 146,380,445.68/13,759.29
  6. Step 6: Final answer
    x = 10,638.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.